公开(公告)号：US20250104952A1

公开(公告)日：2025-03-27

申请号：US18727790

申请日：2023-01-02

Applicant: LS ELECTRIC CO., LTD.

Inventor： Younghwan KIM ,  Kihwan OH ,  Insu SEO ,  Kyunghwan OH ,  Jihyoung KIM ,  Jaesung LEE

IPC: H01H73/18

Abstract: The present disclosure relates to an arc extinguishing unit of a molded case circuit breaker and, more specifically to an arc extinguishing unit of a molded case circuit breaker, having improved arc elongation performance. The arc extinguishing unit of a molded case circuit breaker, according to one embodiment of the present disclosure, comprises: a first side plate and a second side plate arranged to be spaced a predetermined distance apart from each other; a plurality of grids arranged by predetermined intervals between the first side plate and the second side plate; and an insulation member arranged to adjoin each of the plurality of grids.

公开(公告)号：US20220384134A1

公开(公告)日：2022-12-01

申请号：US17755951

申请日：2020-04-09

Applicant: LS ELECTRIC CO., LTD.

Inventor： Kyunghwan OH ,  Kihwan OH ,  Younghwan KIM ,  Jeongjae LIM ,  Yonghun LEE

IPC: H01H71/16 ,  H01H50/18

Abstract: A trip device is disclosed. The trip device according to an embodiment of the present disclosure comprises an adjustment crossbar. The adjustment crossbar is in contact with or is spaced apart from a shooter and can open or close a breaker having the trip device. The adjustment crossbar is formed by coupling a fixed crossbar and a movable crossbar. The movable crossbar is slidably coupled to the fixed crossbar. The shooter is in contact with the fixed crossbar. Therefore, regardless of the movement of the movable crossbar, the contact between the shooter and the fixed crossbar can be maintained.

公开(公告)号：US20210020397A1

公开(公告)日：2021-01-21

申请号：US17060923

申请日：2020-10-01

Applicant: LS Electric Co., LTD.

Inventor： Kihwan OH ,  Kyunghwan OH ,  Younghwan KIM

IPC: H01H73/18 ,  H01H33/08 ,  H01H71/10 ,  H01H9/36

Abstract: The present disclosure relates to an arc extinguishing unit of a molded case circuit breaker with a barrier provided between a fixed contact and a movable contact when a circuit is cut off, including fixed contacts fixed to part of a base assembly case; movable contacts that come contact or are separated from the fixed contacts; and an arc extinguishing part that extinguishes an arc generated when the movable contacts are separated from the fixed contacts. The arc extinguishing part includes a pair of side plates; multiple grids installed at a fixed interval between the pair of side plates; and arc barriers each installed on a base assembly case in a slidable manner, and configured to be in an open state of being separated from the movable contacts when a normal current flows on the circuit or is cutoff, and to close when a fault current is cutoff.